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ROC curves for ABI stratified by baPWV quartile in predicting PAD of the lower extremities (quartile 1, AUC = 0.833, P < 0.0001; quartile 2, AUC = 0.841, P < 0.0001; quartile 3, AUC = 0.817, P < 0.0001; quartile 4, AUC = 0.933, P < 0.0001).
